如图,点C在线段AB上,AC=
BC,点D是线段AB的中点,若AD=3,求线段CD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff998d034284391ca064755fa6bf1b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/c91f35a5-eac7-46c6-afc7-ae800e286f0d.png?resizew=206)
更新时间:2019-03-14 22:23:49
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解答题-问答题
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适中
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【推荐1】如图,
,E是BC的中点,
,
![](https://img.xkw.com/dksih/QBM/2016/2/26/1573976406777856/1573976413306880/STEM/66255a1e7ef84720b3f7f155d74a81b2.png)
(1)求AB的长.
(2)求DE的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f29e92a18194557ea68d922baafedd70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1628a5049ce3b237edb8ffe848c03e30.png)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1573976406777856/1573976413306880/STEM/66255a1e7ef84720b3f7f155d74a81b2.png)
(1)求AB的长.
(2)求DE的长.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,数轴上A,B两点表示的数分别是m,n满足
.点P从A点出发以每秒2个单位的速度往点B的方向运动,点P出发1秒后,点Q从点B出发往点A的方向运动,设点Q的运动时间为t秒,点
出发3秒钟后,点Q恰好位于线段PB的中点处.
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896324893483008/2935691546902528/STEM/9b1ae02f-200e-4991-a332-585267de3d0f.png?resizew=386)
(1)求m,n的值,并求线段AB的长度;
(2)点Q每秒运动多少个单位长度?
(3)当BQ=2PQ时,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42bbf9fbbc7010dbf126f8ce5a279a3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896324893483008/2935691546902528/STEM/9b1ae02f-200e-4991-a332-585267de3d0f.png?resizew=386)
(1)求m,n的值,并求线段AB的长度;
(2)点Q每秒运动多少个单位长度?
(3)当BQ=2PQ时,求t的值.
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